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Publication Details

Rutting Strain Index (RSI) Parameter for Asphalt Performance Engineered Mixture Design General Interest: provides practical guidance to engineers responsible for the day-to-day design, construction, rehabilitation, maintenance, and management of pavements.

Primary Topic: Materials-Asphalt

Description: This Technical Brief provides an overview of how to determine the Rutting Strain Index (RSI) parameter using the stress sweep rutting (SSR) test, the Asphalt Mixture Performance Tester (AMPT), and the FlexMATTM for Rutting nalysis tool. It also presents index threshold values for use in asphalt mixture design and construction.

FHWA Publication Number: FHWA-HRT-21-044

Publication Year: 2021

Document Links: HTML  PDF (file size: 280 KB)



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